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{"common":{"save":0,"post_id":"4766","level":2,"total":10,"point":10,"point_extra":0},"segment":[{"id":"7879","post_id":"4766","mon_id":"1158113","chapter_id":"1158119","question":"<p>Không quy \u0111\u1ed3ng m\u1eabu s\u1ed1, hãy so sánh hai phân s\u1ed1 sau b\u1eb1ng cách \u0111i\u1ec1n d\u1ea5u thích h\u1ee3p (>; <; =)<\/p><p><span class=\"math-tex\">$\\dfrac{18}{19}$<\/span> <input class=\"tim_x input_number\" tpl=\"dien_so\" type=\"text\"\/> <span class=\"math-tex\">$\\dfrac{21}{20}$<\/span><\/p>","options":"","correct":["[\"<\"]"],"level":"2","hint":"<p>So sánh hai phân s\u1ed1 trên v\u1edbi 1.<\/p>","answer":"<p>Vì 18 < 19 nên <span class=\"math-tex\">$\\dfrac{18}{19}$<\/span> < 1<\/p><p>Vì 21 > 20 nên <span class=\"math-tex\">$\\dfrac{21}{20}$<\/span> > 1<\/p><p>Do \u0111ó <span style=\"color:#16a085;\"><span class=\"math-tex\">$\\dfrac{18}{19}<\\dfrac{21}{20}$<\/span><\/span><\/p><p>D\u1ea5u c\u1ea7n \u0111i\u1ec1n là <strong><span style=\"color:#16a085;\"> <<\/span><\/strong><\/p>","type":"blank","extra_type":"","time":"0","user_id":"131","test":"1","date":"2021-09-30 13:20:47"},{"id":"7883","post_id":"4766","mon_id":"1158113","chapter_id":"1158119","question":"<p>Ch\u1ecdn các câu <strong>\u0111úng<\/strong><\/p>","options":["<strong>A.<\/strong> <span class=\"math-tex\">$2\\dfrac{9}{16}=\\dfrac{41}{16}$<\/span>","<strong>B.<\/strong> <span class=\"math-tex\">$7\\dfrac{3}{5}=\\dfrac{38}{7}$<\/span>","<strong>C. <\/strong><span class=\"math-tex\">$6\\dfrac{2}{7}=\\dfrac{44}{7}$<\/span>","<strong>D.<\/strong> <span class=\"math-tex\">$1\\dfrac{8}{23}=\\dfrac{31}{23}$<\/span>"],"correct":"[\"1\",\"3\",\"4\"]","level":"2","hint":"<p>\u0110\u1ed5i h\u1ed7n s\u1ed1 sang phân s\u1ed1: <span class=\"math-tex\">$a\\dfrac{b}{c}=\\dfrac{a.c+b}{c}$<\/span><\/p>","answer":"<p><strong>A.<\/strong> <span class=\"math-tex\">$2\\dfrac{9}{16}=\\dfrac{41}{16}$<\/span> (<span style=\"color:#16a085;\">\u0111úng <\/span>vì <span class=\"math-tex\">$2\\dfrac{9}{16}=\\dfrac{2.16+9}{16}=\\dfrac{41}{16}$<\/span>)<\/p><p><strong>B.<\/strong> <span class=\"math-tex\">$7\\dfrac{3}{5}=\\dfrac{38}{7}$<\/span> (<span style=\"color:#c0392b;\">sai <\/span>vì <span class=\"math-tex\">$7\\dfrac{3}{5}=\\dfrac{7.5+3}{5}=\\dfrac{38}{5}$<\/span> )<\/p><p><strong>C. <\/strong><span class=\"math-tex\">$6\\dfrac{2}{7}=\\dfrac{44}{7}$<\/span> (<span style=\"color:#16a085;\">\u0111úng <\/span>vì <span class=\"math-tex\">$6\\dfrac{2}{7}=\\dfrac{6.7+2}{7}=\\dfrac{44}{7}$<\/span> )<\/p><p><strong>D.<\/strong> <span class=\"math-tex\">$1\\dfrac{8}{23}=\\dfrac{31}{23}$<\/span> (<span style=\"color:#16a085;\">\u0111úng <\/span>vì <span class=\"math-tex\">$1\\dfrac{8}{23}=\\dfrac{1.23+8}{23}=\\dfrac{31}{23}$<\/span> )<\/p><p>Các \u0111áp án \u0111úng là <span style=\"color:#16a085;\"> <strong>A.<\/strong> <span class=\"math-tex\">$2\\dfrac{9}{16}=\\dfrac{41}{16}$<\/span> ; <strong>C. <\/strong><span class=\"math-tex\">$6\\dfrac{2}{7}=\\dfrac{44}{7}$<\/span> và <strong>D.<\/strong> <span class=\"math-tex\">$1\\dfrac{8}{23}=\\dfrac{31}{23}$<\/span><\/span><\/p>","type":"checkbox","extra_type":"classic-checkbox","time":"0","user_id":"131","test":"3","date":"2021-09-30 13:34:48","option_type":"math","len":0},{"id":"7886","post_id":"4766","mon_id":"1158113","chapter_id":"1158119","question":"<p>Ch\u1ecdn câu <strong>\u0111úng<\/strong><\/p>","options":["<strong>A.<\/strong> <span class=\"math-tex\">$\\dfrac{2}{9}<\\dfrac{3}{7}$<\/span>","<strong>B.<\/strong> <span class=\"math-tex\">$\\dfrac{-6}{11}<\\dfrac{-8}{13}$<\/span>","<strong>C.<\/strong> <span class=\"math-tex\">$\\dfrac{6}{-7}=\\dfrac{-8}{9}$<\/span>"],"correct":"1","level":"2","hint":"<p>Quy \u0111\u1ed3ng m\u1eabu các phân s\u1ed1 r\u1ed3i so sánh.<\/p>","answer":"<p><strong>A.<\/strong> <span class=\"math-tex\">$\\dfrac{2}{9}<\\dfrac{3}{7}$<\/span> (<span style=\"color:#16a085;\">\u0111úng <\/span>vì <span class=\"math-tex\">$\\dfrac{2}{9}=\\dfrac{14}{63}$<\/span> và <span class=\"math-tex\">$\\dfrac{3}{7}=\\dfrac{27}{63}$<\/span> mà 14 < 27 nên <span class=\"math-tex\">$\\dfrac{2}{9}<\\dfrac{3}{7}$<\/span> )<\/p><p><strong>B.<\/strong> <span class=\"math-tex\">$\\dfrac{-6}{11}<\\dfrac{-8}{13}$<\/span> (<span style=\"color:#c0392b;\">sai <\/span>vì <span class=\"math-tex\">$\\dfrac{-6}{11}=\\dfrac{-78}{143}$<\/span> và <span class=\"math-tex\">$\\dfrac{-8}{13}=\\dfrac{-88}{143}$<\/span> mà -78 > -88 nên <span class=\"math-tex\">$\\dfrac{-6}{11}>\\dfrac{-8}{13}$<\/span> )<\/p><p><strong>C.<\/strong> <span class=\"math-tex\">$\\dfrac{6}{-7}=\\dfrac{-8}{9}$<\/span> (<span style=\"color:#c0392b;\">sai <\/span>vì <span class=\"math-tex\">$\\dfrac{6}{-7}=\\dfrac{-54}{63}$<\/span> và <span class=\"math-tex\">$\\dfrac{-8}{9}=\\dfrac{-56}{63}$<\/span> mà -54 > -56 nên <span class=\"math-tex\">$\\dfrac{6}{-7}>\\dfrac{-8}{9}$<\/span> )<\/p><p>\u0110áp án \u0111úng là <span style=\"color:#16a085;\"><strong>A.<\/strong> <span class=\"math-tex\">$\\dfrac{2}{9}<\\dfrac{3}{7}$<\/span> <\/span><\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"1","date":"2021-09-30 13:44:10","option_type":"math","len":0}]}